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2013-12-19T18:59:22+01:00
Bonsoir

x²-22x+24 = 0

delta = 484 - 96 = 388    donc Vdelta = V388 = 19.7 arrondi 

deux solutions
x ' = (22 -19.7)/2 = 1.15 
x " = (22+19.7)/2 = 20.85 
Bonne soirée